Array.split

 01 class Array
 02     def split(part)
 03         num = self.length/part.to_i
 04         result = Array.new
 05         for row in 0..(part-1)
 06             result[row] = self[num*row...num*(row+1)]
 07         end
 08         result
 09     end 
 10 end 

a = [1,2,3,4,5,6,7,8,9]
a.split(3).inspect   # => [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

 

build source package in debian

just for memo
need build-essential fakeroot

$ apt-get build-dep package
$ fakeroot apt-get source -b package

then wait for compilation.

$ dpkg -i package

so happy not messing with tarball

 

safari history search

Using the shortcut Command-? for searching help to search history is a very good hacking.

 

ls_color in bsd style

for xterm-color, set in .profile

    alias ls="ls -G"
    export LSCOLORS="ExFxCxDxBxEGEDABAGACAD"

make it more beautiful.

 

set volume in max os x terminal

Costing my much time to search, It seems no command for setting volume in Leopard. When I used AppleScript to do this, I didn't know why the executable file cause some problem in screen. But Ruby's applescript gem do this good. I saved below content as /usr/bin/volume, and then I could use $ volume [1-7 as volume] to set Leopard's Volume from remote.

01 #!/usr/bin/env ruby
02
03 require 'rubygems'
04 require 'applescript'
05
06 AppleScript.execute("set volume #{ARGV[0]}")


update 2008/8/3

the way using applescript interpreter is $ osascript -e "set volume [1-7]"
or call in script by shebang.

01 #!/usr/bin/osascript
02
03 set volume [1-7]